Tabulating mechanism for type writers and like machines



W. T. SAGNER Oct. 13, 1953 TABULATING MECHANISM FOR TYPEWRITERS AND LIKEMACHINES 2 Sheets-Sheet 1 Filed Dec. 8, 1950 r i P @Q INVENTOR. WALTER TSAGNER ,655,245 TABULATING MECHANISM FOR TYPEWRITERS AND LIKE MACHINESFiled Dec. 8, 1950 W. T. SAGNER Oct. 13, 1953 1NVENTOR. WALTER r SAGNERBY WM A TTORNEV Patented Oct. 13, 1953 .TABULATING MECHANISM FOR TYPE-WRITERS AND LIKE MACHINES,

Walter T'. Sagner, West Hartford, Conn., assignor to UnderwoodCorporation, New York, N. Y., a

corporation of Delaware Application December 8, 1950, Serial No. 199,840

Claims. 1

This invention relates to tabulating mechanisms for typewriters and likemachines, and has reference particularly to such mechanisms wherein thetabulator reeds are spring projecting and power retracted.

In tabulating mechanisms of this kind, exemplified in the Yaeger PatentNo. 2,384,060, dc.- pressing any tabulator key will release acorresponding reed for spring projection and also release the carriagefor a tabulating run, all occurring although the power of the machine isshut off. In that retraction of the thus released reed and the resultantrestoration of the carri'age to letter-feed control depend for operationon the motor power 'of the machine, the carriage cannot be returned toits previous position until the motor switch of the machine is againturned on and the normal condition of the tabulating mechanism is thusrestored.

While the above difficulties may be had by inadvertent operation of theusual decimal tabulator keys, the difficulty more frequently arises.with typewriters equipped with a palm tabulator key- For instance, inmerely placing the dust cover on the machine at night, the typi-st mayreadily hit the palm key, which would immediately tabulate the carriageto a laterally projecting position from which same may not be returnedunless the motor power is again turned on.

Accordingly one of the objects. of the invention is to obviate theforegoing difficulties by providing a locking means preventing effectiveoperation of the tabulator keys unless the motor switch of the machineis in its on position.

Another object is to provide, in a tabulating mechanism wherein the reedor reeds are springprojected and power-restored, means under control ofthe motor switch and eifective in the ofi position thereof, to blockoperation of the power means and thereby prevent spring projection ofsaid reeds.

In its more specific aspect the invention concerns power tabulatingmechanisms of the kind shown in the said Yaeger patent, No. 2,384,060,an object being to prevent inadvertent operation by the decimaltabulating keys or the palm key when the switch controlling. theelectric motor of the machine is in 01f position.

With the above and other objects in view the invention will now bedescribed with reference to the accompanying drawings wherein oneembodiment which the invention may assume in practice is shown forpurposes of illustration.

In the drawings,

Fig. 1 is a perspective view of the tabulating mechanism embodying theinvention.

Fig. 2 is a fragmentary elevational view of the mechanism shown in Fig.1, as viewed from the right hand side, the locking device being in itsineffective position corresponding to the on position of the motorswitch.

Fig. 3 is a view similar to Fig. 2 but with the locking device in itseffective position corresponding to the off position of the switch, and

Fig. 4 is a fragmentary front elevation of that portion of the mechanismfor controlling carriage return, in the condition of effecting a powercarriage return and with the motor switch on.

The present invention is shown in the drawing in the manner in which itmay be applied to a power tabulating' mechanism of the kind shown in theYaeger Patent No. 2,384,060. Only a brief showing of the mechanism ofthe Yaeger patent isv given herein, reference being had to said patentfor a more detailed disclosure.

Referring to Fig. 1, a platen carriage is supported by means including arail 1 for travel on the mainframe of the typewriter in letter-feed andreturn directions. The carriage is moved in letter-feed direction by theusual spring drum 8 connected by a draw band 9 to the carriage. Theusual letter-feed mechanism is provided, of which only the escapementwheel [0 and a feeddog I I are herein shown. The escapement wheel I0 isoperatively connectedv to the platen carriage 6 by means including apinion I2 and gear rack I3, the latter being on the carriage. The dog IIis the one of the usual two feed-dogs which, in the inactive conditionof the feed mechanism, is engaged with the escapement wheel. The twofeed-dogs are carried on a dog rocker, not shown, and are therebybrought alternately into coaction with the escapement wheel to effectthe step-by-step feed, in the well-known manner- The dog I l is pivotedon the dog rocker and is spring-urged toward engagement with theescapement wheel l0 and, to free the carriage for a tabulating run, maybe swung clear of said wheel by a lever l4 operated by means laterdescribed.

Carriage return may be actuated by poweroperated mechanism such as thatpartly shown in Fig. 4, which corresponds substantially to that fullydisclosed in my co-pending application, Serial No. 27,224, filed May 15,1948, now Patent No. 2,541,295, issued February 13, 1951. ring to Fig.4, an electric motor, not shown, continuously rotates a gear l5 carriedon a spindle [6. The gear 15 has clutch teeth with which like teeth of aclutch collar I'I engage to effect a driving connection to a drum It, towhich collar IT is slidab-ly splined. The drum I8 and collar I? arejournalled on but rotatable independently of spindle IS. A draw-band 20around the drum [8 extends therefrom over suitable guide means and isconnected at its other end to the carriage 6. An encased spiral spring2| tends to rotate the drum 18 in the direction such as to maintain thedraw-band 20 constantly taut Referduring all movement of the carriage.The clutch collar E1 is shiftable into and out of driving engagementwith gear I5 by a fork 22 engaging a groove of said collar and supportedon a rockshaft 23. Also secured to said shaft is an arm 2d connected bya link 25 to a carriage-return clutch-control lever 26 pivoted at 21. Aspring 28 acting on arm 24 tends to slide collar I! to clutch-engagingposition, and thereby tends to swing the control lever 25 upward aboutpivot 27, in which position said parts are shown in Fig. 4, effectingcarriage return.

As shown, the clutch-control lever 26 is in the tripped or releasedposition, which it assumes in order to close the carriage-return clutch.With the carriage-returnclutch open or disengaged, the control lever 26is in a lower position as indicated by the dot-and-dash outline of itsend portion in Fig. 4. Lever 25 is releasably retained in said lowerposition by a latch device comprising primary and secondary latches 29and 36, operated to release lever 26 by depressing a carriage-returnkey, as disclosed in my said copending application. The operativeconnection of the carriage-return key to latches 29, 36 is such that asthe key is depressed, primary latch 29 moves rearwardly, or rightwardlyas viewed in Fig. 2, and thus releases control lever 26 to the force ofspring 28. The secondary latch 35 is idle under this condition andbecomes effective only in the event that the termination ofcarriage-return swings lever 26 down and yet the latch 25 has not beenrestored because the carriage-return key is held depressed. In suchinstance the secondary latch 30 temporarily holds the lowered lever 26until release of the carriage-return key allows the primary latch 29 totake over. The restoration of control lever 25 to its lower, inactiveposition, automatically incident to completion of carriage return, iseffected by mechanism, not shown herein, forming part of the subjectmatter of my said oo-pending application. Said mechanism becomeseffective when a carriagereturn limiting stop 3|, Fig. 1, engages andmoves a counterstop, not shown. The stop 31 is one of the twoconventional margin stops carried on a rack bar 32 on the carriage 6.

The electric motor which, as stated, furnishes the power for thecarriage-return mechanism,

may also actuate other mechanisms of the type- M writer, such as thetype actions, case-shift mechanism, etc. The operating means for thesevarious power-operated mechanisms usually includes a constantly rotatingdrive element, herein shown as a snatch roll 33, Fig. 1, connected bysuitable power-transmitting means to the motor.

In the electric circuit of said motor is a snap switch 35, Fig. 1,having an operating arm 36 operable from the front of the machine by acontrol element or knob 31. The knob 31 is fast on a stub shaft 33 whichcarries at its inner end a slotted arm 40. The slot of arm 49 engagesthe crank end 41 of a shaft 42. The rear end of the crank shaft carriesa plate 43 provided with a stud 44 into a socket of which the ball endof switch arm 36 extends. The coaction of the stud M with the switch arm36 is such that turning the knob 31 rightward from the ofi position ofFig. 1 closes the snap switch and turning the knob leftward opens theswitch. The plate 43 has articulated to a prong 45 thereon a rightwardlyextending rod 46 which near its right end is slidably guided in a hole 41 in a tabulator housing 48, Fig. 2. An angular end 49 of the rod 46overlies the clutch-control lever 26 nd. i

guided in a transverse slot 50 of a bracket secured to fixture 48. Withthe switch 35 in the off position as in Fig. 1, the rod end 49 coactswith the adjacent inclined edge of the clutchcontrol lever 26 so thatthe rightward end thereof is held lower than the shoulders of both thelatches 29 and 30, see Fig. 3. This position of the control lever end inrelation to said latch shoulders is of importance, also, with respect tothe motor-switch control of the locking device of the tabulatormechanism, later described. With the switch in off position and the endof lever 26 therefore held down, as described, it follows that no powercarriage return may be instituted by operation of the carriage-returnkey. This feature forms part of the subject matter of the Helmond PatentNo. 2,366,107.

In that the power-operated tabulating mechanism, now to be described, islike that shown and described in detail in the Yaeger patent, No.2,384,060, only a brief description will be given. Referring to Fig. 1,a tabulator rack 52 at the rear of the carriage 5 carries a series ofstops 53, each of which is settable downwardly to an effective positionfor cooperation with the raised one of a group of denominationaltabulator reeds 54. The reeds are slidably supported in the housing 48for up and down shifting, and each reed has a spring 55 urging sameupwardly. Each reed also has a forwardly extending shoulder 56 which ispressed by spring 55 into engagement with a cross bar of a bail-likeframe 51, rockable on a shaft 58 and urged to swing counterclockwise bya spring 65. The bail frame, forward of its pivot 58, includes a rod 61which by a link 62 connects the bail frame 51 to an arm 63 secured to ashaft 54 which also has secured thereto a second arm 65. The force ofspring on the bail frame 51, transmitted to arm 65, tends to swing sameforward. Blocking of the forward swing of arm 65 prevents the rocking ofbail frame 51 and thus retains each tabulator reed 54 against beingraised by its spring 55. The blocking of arm 65 and therefore the bailframe 51 is effected by a latch lever 66 abutting a bent-off end of saidarm. By mechanism later described,

the depression of any tabulator key 61 will rock the latch lever 66about its pivot 68 and thereby unblock the arm 55, thus allowing bailframe 51 to be swung counterclockwise by its spring 60. The tabulatorreed 54 which has been selected for raising by means later described isthus permitted to be raised by its spring 55.

The means for selectively releasing a certain one of the tabulator reeds54 for projection by depressing a selected tabulator key 67 includesmechanism operating on the permutation principle. Each tabulator key 61is on a lever 75, an upstanding arm ii of which swings forwardly ondepressing the key. The arm 7| thus forwardly moves a selected one ortwo of a set of four slides 12, determined by an arrangement of notchesin the slides in accordance with the permutation system, and moves theslide or slides forwardly. An equalizing mechanism comprising twocoacting levers 73 for each slide 12 assures fore-and-aft movement ofthe slides in a parallel, rectilinear motion. Each slide 12 isoperatively connected by a Bowden wire cable '34 to a bell crank 15 atthe rear of the machine so that when the selected one or two slides moveforwardly a corresponding one or two of the bell cranks 75 is rockedclockwise. Said bell cranks individually shift laterally-slidable blades13 leftwardly against the force of their restoring springs. The bottomedges .of said. blades [6 are notched in accordance with theper-mutation system, so that by shifting selected blades the notches ofeach blade are aligned with each other beneath only one of the tahulatorreeds 54a and thus allow said reed to bespring-raised.

The above described. function of; bail. frame and associated mechanism,that of preventin raisingof the tabulator-reeds-id, serves primarily inconjunction with tabulating operations eflooted by a palm tahulator key,later described. The principal function of the bail Era-me 151: is.thatof a universalmember to power-retract or restore the raised reed,as presently described. Said bail frame :in its swinging action,incident to raising .a reed, also acts to release the. carriage toa-tabu'lating run by swinging the escapement dog It free of wheel It,for whichpurpose the bail frame 51 is connected .byxa pin-and-eslotconnection 80 to the mentioned lever :14.

The mechanism for power-operating bail frame 51 is as .iollows:vAdjacent the arm :65 the shaft has anotherarm'tl to which alink82 is conneotedt Said link hasya pin-and-slot connection 8:3 to a: power actuator84 movably supported at its forward; end by an varm'lifi. The actuator84 is urged by :a spring .86; an upward and rearwarddirection to an.extent determined by step means, not. shown The actuator 84 pivotallycarries; a drive pawl -8 -I- cooperating with, but normally :i'ree of,the snatch roll 33..

To efiect; power actuation :of the bail frame 51, the actuator M isdrawn. downwardly against theiorce of spring 86 by means laterdescribed. During the downward movement of actuator 86 the pawl 8-!becomes engaged with the snatch roll 33 and, after limitedly rockingabout its pivot, moves the actuator forward until a lug 88 thereonco-acts with the. snatch roll 3.3 to raise the actuator and thusdisengage the pawl from the snatch roll. This forward movement. of'theactuator t lt'transmitted through the link 82 and arm at, rocks theshaft.6. which, through arm 63 raises link @2- and thus rocks the. bail frame5% clockwise. The bail frame '51, .in restoring the. raised reed 54 toits normal position, thus assumes its position as shown 'Fig. 1 fromwhich it had been swung by the raising action oi the reed. it: will beseen that the bail frame 51, the operating train (it-Moonnected theretoand the power-actuated device ilk-85 constitute a power-operatedretracting means for the tabulator reeds 54.

It will be noted that the start of the tabulatin-g operation, incidentto which the-selected reed was raised, was instituted by depressing oneof the tabulator keys 6?, and this in turn swung the latch lever 66clear of the arm 65. The releaseof the tabulator key allows latch lever66 to be restored to its normal position where, upon completionof thepower actuation of bail frame 51" as above described, said latch leverre-engages arm E5, to hold the bail frame and associated mechanismconnecting the frame to the power actuator $4, in its normal or inactiveposition.

The operation of latch lever 66 by thetabulator keys 6? is efiectedincident to the forward sliding of the blades 12. At their rightwardends said blades each have a shoulder 90 adapted to actuate anupstanding arm of a bell-crank lever EM, the other arm of which engagesa lever 92, which in turn engages the forward end of latch lever 86.Lever 92 extends rightw-ardly from the point of engagement with lever'65 in aprong 93 at which point a leverage train, in-

eluding a palm tabulator key, engages lever 92 for operating latchlever- .6 E.

Thepalm-tabulator keymeohanism, not shown herein, may be as shown anddescribed in said Yaeger patent. It. may be here noted that, because thepalm-key mechanism in said patent operates independently of thetabulator-reed se' 'lecting mechanism, one of the reeds 54 is to. bereleased. without operating the selecting mechanism. That is, .one. ofthe reeds should be released solely by the swinging of the bail frame 51as effected by release of the arm 65 from 0011'. trolbyzlatch lever 5.6.Accordingly the leftmost tabulator reed '54, associated with thetabulator key .6! or the cents. denomination is. adapted tor-releasealso by the palm key, this being accomplished in the manner clearly setforth .in said Yaeger patent.

As describedin said .Yaeger patent, the tabulator reeds :5 t are.limitedly movable leftwardly from their normal positions and thismovement is employed to initiate a power operation of the retractingmechanism. Thus, a projected reed, upon/being engaged by a :settabulator stop 53 during the then ensuing tabulating run, is caused tohe'laterally moved slightly. This in turn initiates. the power operationof the restoring bail frame 511, so that the projected reed becomesautomatically restored. An upright arm of a three-arm lever 94 isengaged by the leftmost reed 15.4. Lever ti t is: pivoted at 95 and isconnected by a link 96 to a second lever 91 fulcrumed on shaft 58 and,from lever 91, is connected by alink 98 .to a bail I00. The rightwardportion of bail I08 has a pin-and-slot connection IBI. to .apower-tripping lever 1G2 pivoted at I93 and urged by a spring I04 toswing clockwise. The 'force of spring HM, transmitted through theoperating train just described, tends to rotate the three-arm lever 94clockwise about its pivot 95 .and thus presses the group of reeds 5A tothe normal rightmost position. The lever [.62. carries a hooked memberHi5 which, upon swinging said lever counterclockwise, becomes engagedwith 2. lug I06 on the actuator 84, causing same to be lowered and thusinitiate a power operationv of the restoring bail frame 57, aspreviously described. The connection of the hooked member I05 to leverI02 and the manner in which said :member operates, and thereafterbecomes disengaged from, the power actuator 84 are well known and neednot be here described.

The latch lever 66 has a latch It! pivoted thereon, said latch beingspring-pressed clockwise, with its rightwardportion normally against thebottom of lever 66'. When an operated tabulator key 61 or the palm keyis held depressed, latch I 81 prevents a repeat tabulation bytemporarily latching arm 65 in its normal position as said arm reachesthat position incident to conclusion ofa power operation of thereed-restorlng hail frameil In this way bail frame 51 is presented fromagain swinging upward by its spring 60, which would again release thecarriage 6 and again project the reed 54 which had been selected by thedepressed tabulator key. As soon as the operated key is released, thelatch lever .66 returns. to its normal position shown in Fig. l and thusresumes control of the reedrestoring mechanism by re-engaging arm '65.

The various mechanisms described up to this point 'form the subjectmatter of or are disclosed in several prior patents, with the exceptionof the mechanism for automatically terminating power-return of thecarriage, which mechanism forms part of the subject matter of my(re-pending application, Serial No. 27,224, now Patent No. 2,541,295,issued February 13, 1951. As aforeindicated, the principal relatedpatent is that to Yaeger, No. 2,384,060, in the power tabulatingmechanism of which the locking means of the present invention isparticularly useful and advantageous. It will be recalled. that in saidpatent the tabulator reeds are springprojected and power-retracted, asherein described. The other related patent is that to Helrnond, No.2,366,107, referred to in regard to the mechanism for manually operatingthe motor switch and in regard to the operative connection between thisswitch and the carriage-return clutch-control lever 25. It will beobserved as the description of the present invention proceeds that theclutch-control lever and the motor-switch operating mechanism, with itsoperative connection to said lever, form a substantial part of themechanism embodying the present invention.

The mechanism associated with the motorswitch operating means S'i-t iand the clutchcontrol lever 25, by which efiective operation of thetabulatcr keys is prevented while the motor switch is off, will now bedescribed. It will be recalled that the clutch-control lever 26 islatched in a down position as shown in Fig. l by the primary latch 29and that said lever remains in substantially that position during alloperations of the machine occurring incident to typing, moving therefromonly to institute carriage return. It will also be recalled that undercertain conditions, when they occur at the completion of carriagereturn, the secondary latch 53 will temporarily hold lever 25 until thatcondition is eliminated, after which the primary latch 29 again assumescontrol of said lever. For reasons explained in Helmond patent, No.2,262,676, it is necessary that the latching shoulder of the secondarylatch be slightly lower than the shoulder of primary latch 28, see Fig.2. To enable the secondary latch to engage lever 26, said lever must interminating carriage return be lowered sufficiently to have said latchhook over same. Thus the clutch-control lever 28, although remainingunder non-operative control by the primary latch 29, is capable ofslight up and down movement at its latched end. It will be observed thatthis slight movement occurs also in response to operating the motorswitch between on and off positions. The upper position of lever 2'5,Fig. 2, in which its lever end portion is against the shoulder of latch29, is assumed when the motor switch 85 is in the on position and thelower position of lever 23, Fig. 3. is assumed when said motor switch isin the "off position. Referring to Fig. 1 it will be evident that thesetwo positions of clutch-control lever 26 in its non-operative stateresult from the camming action of the angular end 49 of rod M5 on theinclined edge of said lever. This slight movement of lever 25 isemployed to control the locking device now to be described.

The shaft 64, forming a part of the mechanism by which the bail frame 51is operated to power-restore the reeds 54, has at its rightward portiona C-shaped arm Ht secured thereto, the upper end of which provides alaterally extending lug HI. On a bracket H2 secured to the mainframe ofthe typewriter a locking lever H3 is pivoted by a stud H4. To permitlever H3 to yield under certain conditions, said lever is constructed oftwo parts H5 and H6. The two parts overlap and both parts are supportedon the pivot stud H4. A spring H1 tensioned between upreaching arms onthe two lever parts tends to rotate part H6 clockwise toward part H5,but is blocked from such relative movement by an adjustable eccentric HBon part H6 engaging an arm [20 on part H5. The two-part yieldableconstruction of lever H3, however, enables it to yield when the part H5is rotated clockwise and part H6 is blocked against movement. The leverpart H5 has a rearwardly projecting arm extending beneath the endportion of the clutch-control lever 26. The two-part lever H3 is urgedby a spring (2| to swing counterclockwise, the spring being connected tothe lever part H6 and anchored on bracket H2. The spring H1 is to besubstantially stronger than spring l2! so that the two-part lever H3will not yield under the restoring force of spring [2L In its normal orunoperated position, Fig. 2, the part H6 of lever H3 rests against astop lug 22 on said bracket. The leftward portion of lever part H6 hastwo bent-off portions forming right-angularly related faces I23 and l24extending laterally from said lever part.

The operation of the locking device comprising the two-part lever I 13will now be described. It will be recalled that as a tabulatingoperation is initiated, the latch lever 66 is swung counterclockwisefree of the lug of arm to thus allow the bail frame 5! to rockcounterclockwise and thereby permit a selected reed 54 to be raised.During this action the shaft 64 rocks clockwise as viewed in Fig. 2 andthe C-shaped arm H0, swinging therewith, advances its lug Hi past theface 123 of lever part H6. The lever face I23 is out of the path of lugH i because the two-part lever H3 is in its normal position, Fig. 2,which it assumes under the force of its spring I 2| when theclutch-control lever 26 is in its upper position against the shoulder oflatch 29. This upper position of lever 26 is assumed when said lever isnot influenced by the camming action of the rod end 49, the rod 45 beingat a rightward position as viewed in Fig. 1 because the motor switch 35is turned on. It will now be seen that a tabulating operation, initiatedby rocking the latch lever 66, will progress to completion through theseveral phases of operation above described, as long as the motor switch35 is turned on, with the control knob 37 thereof in the on position.

When the motor switch 35 is turned off by rotating its control knob 31to the "off position, the resultant leftward shifting of rod 43 causesits angular end 49 to cam the clutch-control lever 26 downward so thatits lower end assumes the position shown in Fig. 3. During this downwardmovement, lever 26 actuates the twopart lever H3, swinging sameclockwise about its pivot H4 so that the face 123 thereof moves into thepath of arm lug HI. By thus blocking movement of arm H0, 2. tabulatingoperation is prevented, although the depression of the tab-- ulator keyhas swung latch lever 65 clear of arm 65. The effect of this blocking ofarm H8, operating through shaft 64, arm 63' and link 62, is to preventthe bail frame 51 from rocking counterclockwise, thus preventing therise of any of the tabulator reeds 54. In that the operation of thistrain of mechanism is necessary to initiate any tabulating operation,the blocking of same as described prevents a tabulating operation fromoccurring, whether it be initiated by the decimal tabulator keys or thepalm key.

The face I24 on lever H3 obviates the chance of the lug IH becomingcaught in back of face I 23, in the event that the motor switch 35should be turned off immediately after a tabulating operation has begun.In such instance the C- shaped arm HI] will have swung rightward so thatits lug III has moved past the face I23 While the two-part lever H3 isstill in the Fig. 2 position. Turning the motor switch off at thatinstant and thereby rocking lever H3 toward the Fig. 3 position wouldbring the lug of face I23 up in back of the lug Ill, where it wouldobstruct the subsequent return of arm Hii. It will be seen that theprovision of the face I24 prevents this condition from arising. That is,as lever H3 swings clockwise, its face I24 will engage the lower edge oflug Ill. The blocking of lever H 3 at face I24 in this manner will causesaid lever to yield, by further tensioning spring H'I, which conditionwill prevail until the return of the C-shaped lever H to its normalposition will move its lug off face I24 and allow the lever part H3 tosnap into its normal position by spring H1. The face I23 of lever H3will thus move into abutting relation with the lug III of arm H0.

Although the invention is described as embodied in a decimal ordenominational tabulating mechanism, having therefore a plurality ofkeys and corresponding reeds, it will be understood that the inventionis also advantageous in column tabulators having only a single key andtabulator reed. In fact, the tabulator mechanism herein set forth ascontrolled by the palm tabulator key is in effect a column tabulatormechanism. while it is desirable to employ a reed-selecting mechanismbased on the permutation principle as herein described, the selection ofsaid reeds may be effected by conventional means, that is, by a train ofmechanism for each decimal tabulator key, individually connecting saidkey to the corresponding reed, as also set forth in the Yaeger patent.

What is claimed is:

1. In a typewriter tabulating mechanism, a plurality of reeds eachprojectable to a position for arresting the carriage in a tabulatingrun, spring means to project said reeds, means in cluding keys toselectively release said reeds for projection, means including a motorfor powerretracting the projected reeds, said retracting means includinga movable member normally obstructing projection of said reeds, controlmeans for said motor including an element movable to on and offpositions, and means, rendered effective upon movement of said controlelement to off position, to obstruct operation of said retracting meansand thereby hold its member in the reed-obstructing position preventingeffective projection of said reeds while said control element is in theoff position. I

2. In a typewriter tabulating mechanism, a plurality of reeds eachprojectable to a position for arresting the carriage in a tabulatingrun, spring means to project said reeds, means common to all of saidreeds and including a motor for power-retracting the projected reeds,means normally blocking operation of said retracting means, key-operatedmeans to selectively release said reeds for projection and disable saidblocking means, control means for said motor includ- It will also beunderstood that,

ing an element movable to on and off positions, and means effective uponmovement of said control element to the off position to preventoperation of said power-operated retracting means although released bydisablement of said blocking means.

3. In a typewriter tabulating mechanism, a plurality of reeds eachprojectable to a position for arresting the carriage in a tabulatingrun, spring means to project said reeds, a bail frame common to all ofsaid reeds and normally disposed to retain said reeds retracted andadapted to be displaced incident to projecting a reed, power meansincluding a motor and an operating train to said bail frame to rock saidframe and thereby retract the projected reed, control means for saidmotor including an element movable to on and off positions, a devicenormally free of and adapted to obstruct operation of said operatingtrain, and means effective upon moving said control element to the ofiposition to cause said device to obstruct the operating train andthereby prevent projection of said reeds by retaining the bail frame inits normal position.

4. In a typewriter tabulating mechanism, a plurality of reeds eachprojectable to a position for arresting the carriage in a tabulatingrun, spring means to project said reeds, means including a set of keysto releasably retain said reeds retracted and selectively release saidreeds for projection, a bail frame common to all of said reeds andnormally disposed to retain said reeds retracted and adapted to bedisplaced incident to projecting a released reed, power means includinga motor and an operating train to said bail frame to rock said frame andthereby retract the projected reeds, means normally blocking operationof said operating train and rendered inefiective by operation of saidkeys, control means for said motor including an element movable to onand off positions, a device normally free of and adapted to obstructoperation of said operating train, and means effective upon moving saidcontrol element to the off position to cause said device to obstruct theoperating train although the latter is released by disabling theblocking means.

.5. In a typewriter tabulating mechanism, a. tabulator reed urged toproject to a position for arresting the carriage in a tabulating run,releasable means to retain the reed retracted, a key-operable devicenormally blocking said retaining means and effective upon operating saidkey to release the retaining means and thereby release the reed forprojection, said retaining means, upon being reversely operated afterrelease, being adapted to retract the projected reed, power meansincluding a motor to reversely operate said reed-retaining means andthereby retract the projected reed, control means for said motorincluding an element movable to on and off positions, and means,effective with said control element in the off position, to obstruct thereed-releasing action of said reed-retaining means.

WALTER. T. SAGNER.

Tholstrup Sept. 2, 1941 Yaeger Sept. 4, 1945 Number

